nagios 监控内存使用情况

xiaowei8782088

• 　　监控本机内存
  cd /usr/lib64/nagios/plugins
  touch check_mem.sh
  
  
  
  
  
  #!/bin/bash
  if [ "$1" = "-w" ] && [ "$2" -gt "0" ] && [ "$3" = "-c" ] && [ "$4" -gt "0" ]; then
  memTotal_b=`free -b |grep Mem |awk '{print $2}'`
  memFree_b=`free -b |grep Mem |awk '{print $4}'`
  memBuffer_b=`free -b |grep Mem |awk '{print $6}'`
  memCache_b=`free -b |grep Mem |awk '{print $7}'`
  memTotal_m=`free -m |grep Mem |awk '{print $2}'`
  memFree_m=`free -m |grep Mem |awk '{print $4}'`
  memBuffer_m=`free -m |grep Mem |awk '{print $6}'`
  memCache_m=`free -m |grep Mem |awk '{print $7}'`
  memUsed_b=$(($memTotal_b-$memFree_b-$memBuffer_b-$memCache_b))
  memUsed_m=$(($memTotal_m-$memFree_m-$memBuffer_m-$memCache_m))
  memUsedPrc=$((($memUsed_b*100)/$memTotal_b))
  
  if [ "$memUsedPrc" -ge "$4" ]; then
  echo "Memory: CRITICAL Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
  $(exit 2)
  elif [ "$memUsedPrc" -ge "$2" ]; then
  echo "Memory: WARNING Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
  $(exit 1)
  else
  echo "Memory: OK Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
  $(exit 0)
  fi
  else
  echo "check_mem v1.1"
  echo ""
  echo "Usage:"
  echo "check_mem.sh -w <warnlevel> -c <critlevel>"
  echo ""
  echo "warnlevel and critlevel is percentage value without %"
  echo ""
  echo "Copyright (C) 2012 Lukasz Gogolin (lukasz.gogolin@gmail.com)"
  exit
  fi
  check_mem.sh Code　　chmod +x check_mem.sh
  测试check_mem脚本是否能正常使用
  ./check_mem.sh -w 80 -c 90
  修改commands.cfg配置
  vi /etc/nagios/objects/commands.cfg
  
  
  
  
  
  define command{
  command_name        check_mem
  command_line        $USER1$/check_mem.sh -w $ARG1$ -c $ARG2$
  }
  commands.cfg Code　　vi /etc/nagios/objects/localhost.cfg
  
  
  
  
  
  define service{
  use                             local-service,srv-pnp
  host_name                       localhost
  service_description             check_mem
  check_command                   check_mem!80!90
  }
  localhost.cfg Code
  
• 监控被监控机内存使用情况
  拷贝check_mem文件到被监控机的/usr/lib64/nagios/plugins目录下
  scp check_mem root@serverip:/usr/lib64/nagios/plugins/
  修改nrpe.cfg
  vi /usr/local/nagios/etc/nrpe.cfg
  增加一行：command[check_mem]=/usr/lib64/nagios/plugins/check_mem.sh -w 80 -c 90  
  回到nagios监控机修改服务项
  vi /etc/nagios/objects/services.cfg
  增加如下监控代码
  
  
  
  
  define service{
  use                     generic-service
  host_name               Nagios_Centos_Client1
  service_description     Memery Monitoring
  check_command           check_nrpe!check_mem
  }
  Check_mem Code　　nagios -v nagios.cfg
  重启nagios即可